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Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified | Dec. 31, 2011 | Dec. 31, 2010
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Consolidated Balance Sheets [Abstract] |  |
Accounts receivable, allowance | $ 5 | $ 51
Preferred stock, par value | $ 0.001 | $ 0.001
Preferred stock, shares authorized | 5,000 | 5,000
Preferred stock, shares issued | 3 | 3
Preferred stock, shares outstanding | 3 | 3
Preferred stock, liquidation preference | $ 9,496 | $ 9,496
Common stock, par value | $ 0.001 | $ 0.001
Common stock, shares authorized | 112,500 | 112,500
Common stock, shares issued | 51,211 | 47,329
Common stock, shares outstanding | 51,211 | 47,329

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